package wtclient import ( "github.com/btcsuite/btcd/btcec" "github.com/lightningnetwork/lnd/keychain" ) // DeriveSessionKey accepts an session key index for an existing session and // derives the HD private key to be used to authenticate the brontide transport // and authenticate requests sent to the tower. The key will use the // keychain.KeyFamilyTowerSession and the provided index, giving a BIP43 // derivation path of: // // * m/1017'/coinType'/8/0/index func DeriveSessionKey(keyRing ECDHKeyRing, index uint32) (*btcec.PrivateKey, error) { return keyRing.DerivePrivKey(keychain.KeyDescriptor{ KeyLocator: keychain.KeyLocator{ Family: keychain.KeyFamilyTowerSession, Index: index, }, }) }